Microwave oven



FIG. 1 is a front, top and right side perspective view of a microwave oven showing our new design;

FIG. 2 is a right side elevational view thereof, the left side being a mirror image;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a front, top and right side perspective view of a second embodiment thereof;

FIG. 6 is a front, top and right side perspective view thereof, the pair of louvers being in an open position;

FIG. 7 is a right side elevational view thereof, the left side being a mirror image; and,

FIG. 8 is a top plan view thereof.

The undisclosed rear for both embodiments is plain, flat and unornamented. The undisclosed bottom view of the second embodiment is the same as FIG. 4. 

The ornamental design for a microwave oven, as shown and described. 